51 



Panicum. 



Paniciiin sanjjuinalo Crab grass. 



Panicum capillare .Old witch grass. 



Panicum latifolium Panic gras-s. 



Panicum dichotomun; Panic grass. 



Panicum CiUN-galli llarnyard grass. 



P.tniciiin depauperatrm Panic grass. 



Panicum zantl.ophysum Panic grass. 



Setaria. 



Setaria viridis Qreen foxtail grass. 



Setaria Italica Millet. 



Andropooon. 



Andropogon provincialis Beard grass. 



Andropogon scoparius Beard grass. 



AOROPYRUM. 



Agropyrum caninum Spear grass. 



Agropyrum repens Couch grass. 



Order 130. EQU I SETACE^E.— Horsetail Family. 



Equisetum. 



Equisetum arvense Common horsetail. 



Equisetum pratense Meadow horsetail. 



Equisetum palustre Water horsetail. 



Equisetum limosum River horsetail 



Equisetum hyemale Scouring rush. 



Equisetum variegatum Variegated horsetail. 



Equisetum scirpoides Little horsetail. 



Order 131. FIL ICES.— Ferns. 



POLYPODIUM. 



Polypodium vulgare Polypody. 



Adiantum. 

 Adiantum pedatum Maidenhair. 



1 Pteris. 

 Pteris aquilina Common brake. 



